The core of the app, the way you share photos with your friends, is fundamentally flawed.

If someone sends you a photo in Slingshot, you can't see it until you send a photo back to that person. It's like responding to an email without reading the contents. Last night, I ended up sending photos of my couch, my living room wall, and my eyeball to a few friends just so I could see what they sent me. Eventually, I got stuck in a bizarre selfie loop with a friend because all we wanted to do was see the original photo each of us had sent.

Slingshot doesn't reduce the friction in communication, it throws up a giant wall by forcing you to blindly respond to messages before you view them.

Those forced responses feel like a cheap way for Facebook to artificially boost the engagement in Slingshot without adding any real value to users. It might give the app a nice boost at first, but I suspect people will grow bored of the game very quickly, just like I did.